Seametrics FT420 Instructions

General Information
The FT420 is a loop-powered microcontroller-based
transmitter/indicator. It displays rate and total, and pro-
vides a 4-20 mA analog signal proportional to flow. A
programmable pulse output is also standard for meter-
ing pump control or data logging.
The rugged cast-aluminum housing is gasketed for
maximum environmental protection, and the electron-
ics are potted into a solid block of urethane. A mem-
brane keypad allows settings to be changed without
removing the cover. The universal mount version
comes with brackets for wall mounting, and also with
an adaptor for field installation on 80-series flow sen-
sors. The FT420 can also be factory or field installed
on a TX100/200 series sensor or WT meter.
Features
Sturdy gasketed cover
with electronics
potted in
Removeable foot brackets
for wall mounting
Easy set-up
prompts
Specifications
Power
Display
Pulse Output
Input
K factor Range
Pulse Output Range
Temperature
Environmental
10.5
2341678.9
RESET
SET K
SET
Two wire
4-20 mA output standard
FT420 Flow Computer
Instructions
4 mA DC (4-20 mA loop),
12-32 VDC
Rate 6-digit autorange, 1/2"
charater height
Total 8-digit, 5/16" character
height
• 0.1 second open collector
pulse (scaled)
• sensor pulse (unscaled)
Pulse frequency + 5 VDC
0.050 - 2000
0.1 - 200,000 units/pulse
0 C - 70 C
NEMA 4X
Large rate numerals
Triple bosses for
watertight input/output
connections
PUB -19750-0999
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